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Revision: 83
Committed: Mon Jan 1 11:31:15 2018 UTC (6 years, 2 months ago) by tony
File size: 37765 byte(s)
Log Message:
IBDatabaseInfo: Remove memory leak when accessing database operation counts

File Contents

# User Rev Content
1 tony 80 IBX Change Log version (2.1-0) Fri, 15 Dec 2017 12:20:11 +0000
2 tony 56
3     1. IBCustomDataset: Minor change of PChar to PByte for compatibility with fbintf
4     changes.
5    
6 tony 58 2. IBCustomDataset: Fixed use of incorrect datasize in TIBStringField.SetAsString.
7     Bug could result in truncated multi-byte character set values.
8    
9 tony 60 3. Changes consequential on moving fbintf character set utility functions from
10     IFirebirdAPI to IAttachment.
11    
12 tony 62 4. Avoid "Object is nil" error when opening a database with DefaultSystemCodePage = true
13    
14 tony 64 5. IBLookupComboEditBox: avoid race condition when autocompleting text that occasionally
15     results in autocomplete ignoring prefix text.
16    
17 tony 65 6. IBLookupComboEditBox: Ensure that cursor is not reset to start of text when
18     entering a new name into the text box.
19    
20 tony 66 7. IBCustomDataset: ensure that TIBStringField uses the field size reported by
21     Firebird rather than recomputing it.
22    
23 tony 67 8. Property Editor positioning tidy up: All IBX Property editors should now be
24     screen centre. Previously some were "poDesigned" which may be inappropriate
25     for multi monitor desktops.
26    
27 tony 80 10. TIBTreeView.FindNode: protect against error if zero length path or empty tree node.
28    
29     11. TIBTransaction: On Force Disconnect do not raise an exception when problem ending
30     a transaction and always reset the object.
31    
32     12. TIBQuery tidyup: remove unnecessary call to GetAffectedRows.
33    
34     13. TIBXScript: Allow for override of database filename in Create Database statements.
35    
36     14. IBLocaldb: Support initialisation of the database from an SQL script in addition
37     to a gbak format archive.
38    
39     15. IBLocaldb: fix problem that stopped the OnSharedDataDir event from being recognised.
40    
41     16. IBLocaldb: Drop database if error creating an empty database.
42    
43     17. TIBTreeView: improve performance when selecting node - avoid refreshing dataset
44     unless selected node not in current dataset.
45    
46     18. IBServices: SetDBParams method moved from TCustomIBLocalDBSupport (in IBLocalDB package)
47     to TIBCustomService, and IBlocalDB code tidy up.
48    
49     19. IBTreeView: Initialise TIBTreeNode KeyValue to null to avoid unpredictable
50     behaviour due to uninitialised variable.
51    
52     20. IBServices: Correct encoding of isc_spb_prp_write_mode in TIBConfigService from
53     integer to byte. Ditto isc_spb_prp_reserve_space and isc_spb_prp_access_mode.
54    
55     21. IBSQL: When Database changed ensure that all resources are freed.
56    
57     22. IBCustomDataset: When database changed ensure that queries an unprepared.
58    
59     23. SQL Property Editors now use SynEdit with SQL Highlighter.
60    
61     24. IBDataOutput: print statistics using float (%f) format instead of decimal (%d).
62    
63     25. IBTreeView: Call to FindNode: param type change from "array of Variant" to
64     TVariantArray. Seems to avoid memory corruption in Windows (probably a
65     workaround for a problem in fpc 3.0.4 win64).
66    
67     26. IBDatabaseInfo: Code tidy up. Add check for database not assigned or not open.
68    
69 tony 83 27. IBDatabaseInfo: Remove memory leak when accessing database operation counts.
70    
71 tony 51 IBX Change Log version (2.0-2) Fri, 24 Feb 2017 12:17:53 +0000
72 tony 49
73 tony 51 1. TIBDatabase.CreateDatabase: extract full DB Name from SQL using reg ex in order to
74 tony 49 include remote system name.
75    
76     2. TIBExtract: No longer include comment header and COMMIT statement for empty
77     tables when data included in output.
78    
79     3. Profiling: IBSQL now has conditional compilation flags to enable query performance
80     and timing information to be written to stdout. This may be used to locate
81     performance bottlenecks.
82    
83     4. SQLParser: only call "OnChanging" event handler when value is different.
84    
85     5. IBDynamicGrid: Update handling of navigation keys for a TDateEdit
86    
87 tony 50 6. IBCustomDataset: Set internalunprepared flag when transaction ends. This ensures
88     that BindFields is called when the query is next activated. Avoids FieldName
89     not found error.
90    
91 tony 80 7. IBUpdate: This is a new IBX component similar to TIBUpdateSQL. It is more general
92     purpose and allows the programmer to define any action they want for Update, Insert
93     or Delete. This may be complex SQL (similar to a Trigger), application specific
94     filtering of updates, or use of statements such as Grant or Revoke instead of
95     normal DML. See User Manual for more information.
96    
97 tony 47 IBX Change Log version (2.0-1) Mon, 09 Jan 2017 15:31:49 +0000
98 tony 45
99 tony 47 1. TIBEvents: Fix uninitialised variable that could result in lost events.
100 tony 45
101 tony 47 2. TIBExtract: Added support for FB3 "USAGE" privilege.
102    
103     3. TIBExtract: data formatted as Charset set "octets" is now output using
104     hexadecimal notation.
105    
106     4. TIBExtract: Binary Blobs and array data can now be embedded in INSERT statements
107     using a simple XML format.
108    
109     5. TIBExtract: extract of individual Triggers and Stored Procedures can now include
110     grants to these objects.
111    
112     6. TIBExtract: Stored Procedures and Views output in dependency order to avoid
113     dependency problems restoring complex databases.
114    
115     7. TIBXScript: This component has been restructured to allow for the processing of
116     embedded XML in INSERT statements and to support interactive sources in addition
117     to non-interactive data sources such as files.
118    
119     8. TIBXScript: CREATE DATABASE, DROP DATABASE, CONNECT statements are now supported.
120    
121     9. TIBXScript: ISQL compatiable Set statements are now supported:
122     SET SQL DIALECT
123     SET TERM
124     SET AUTODDL
125     SET BAIL
126     SET ECHO
127     SET COUNT
128     SET STATS
129     SET NAMES <character set>
130    
131     10. IBVersion unit added to hold current IBX Version Number information.
132    
133     11. TIBExtract: Use character rather than byte length for VarChar procedure arguments.,
134     and domain definitions.
135    
136     12. TIBExtract: Triggers now use SQL2003 syntax and database and transaction triggers
137     fully supported.
138    
139     13. TIBExtract: when a database dump includes data, the generator values are now also set.
140    
141     14: IBSQLEdit: Unit LCLPlatformDef added to uses clauses for lazarus 1.7 and later.
142    
143     IBX Change Log version (2.0-0) Tue, 06 Dec 2016 10:33:44 +0000
144    
145 tony 50 See also doc/IBX4LazarusGuide.pdf for important information on
146 tony 45 upgrading to IBX2.
147    
148     1. Size property of TIBStringField is now the width in characters of the field
149     and not the byte length. This applies only to multi-byte character sets such
150     as UTF8. The original approach aligned with TStringField. However, the TStringField
151     code is not recognised as a bug and hence this change to align the behaviour.
152     The TStringField change is expected in fpc 3.2.0.
153    
154     2. A new property AutoFieldSize: boolean has been added to TIBStringField. When
155     true (default) then Size property value saved in the lfm is ignored. Size is
156     always set from the dynamic information read from the database. It is unclear
157     why anyone would want to override this and set Size to false.
158    
159     3. ibxscript: should now handle correctly a Case..End statement within a procedure
160     block.
161    
162     4. IBDatabase: new property - CreateIfNotExists. If true and database does not
163     exist when an attempt is made to connect to it (run time only) then an attempt
164     is made to create the database.
165    
166     5. IBDatabase: new event - OnCreateDatabase. This event is called after a database
167     has been successfully created as a result of a call to CreateDatabase or when
168     creating a database after it was found not to exist.
169    
170     6. DBControlGrid: a race condition could result in the wrong row image being
171     written to the cache. This has been avoided by a trip round the message
172     loop before rendering the row image.
173    
174     7. DBControlGrid: It is strongly recommended not to open the source DataSet for
175     a DBControlGrid during a Form's "OnShow" event handler. Under GTK2 this is
176     known to risk corrupt rendering of row images when the control is first
177     displayed. If necessary use "Application.QueueAsyncCall" to delay opening
178     of the dataset (see DBControlGrid examples) until the Form's Window has been created.
179    
180     8. DBControlGrid & IBDynamicGrid: Navigation keys should now work correctly with
181     a TDateEdit control located on an editor panel.
182    
183     9. TIBExtract: brought up-to-date plus many bug fixes.
184    
185     10. DBControlGrid: Removed memory leak when updating rows.
186    
187     11. TIBCMLocalDBSupport: fixed invalid free on upgrade.
188    
189 tony 43 IBX Change Log version (1.4-3) Thu, 22 Sep 2016 18:10:15 +0100
190    
191     1. IBCustomDataset: When calling SetCodePage, no longer request transliteration
192     when target codepage is CP_NONE. This is a workaround for
193     http://bugs.freepascal.org/view.php?id=30622.
194    
195     2. DBLog option removed from TIBStatisticalService - not supported by server
196     since Firebird 1.5.
197    
198     3. ibxscript: An error is no longer generated for "on commit preserve rows" or
199     similar.
200    
201     4. IBCodePage: updated mapping between codepages and character id.
202    
203     5. ftWideString and ftWideMemo withdrawn. There is no UTF16 character set in
204     Firebird. Character sets with a char width of two are not UTF16.
205    
206     6. Strings received from the database are now always transliterated into UTF8
207     regardless of the database character set or connection character set. This
208     is for compatibility with the LCL.
209    
210 tony 45 IBX Change Log version (1.4-2) Thu, 22 Sep 2016 15:25:27 +0100
211 tony 41
212     1. IBBlob: Defer reading of blob until read method called. This avoids having to
213     read in an entire blob just to get the size of the blob. General performance
214     improvement when opening datasets containing blobs.
215    
216     2. Clearing a Blob now sets the corresponding field's modified flag.
217    
218     3. IBLookupCombo: When not performing auto-complete, original query sort order
219     is now used.
220    
221     4. IBDynamicGrid: Add OnSelectEditor event. Allows editor panel to be dynamically
222     determined.
223    
224     5. IBDynamicGrid: Recompute column widths after dataset closed and re-opened.
225    
226     6. IBLookupCombo: LazUTF8 added to uses clause to avoid compilation problems post
227     lazarus 1.6.0
228    
229     7. IBControls. Removed "runtime" from list of paths to avoid "multiple packages"
230     compilation error.
231    
232 tony 39 IBX Change Log version (1.4-1) Tue, 17 May 2016 09:14:51 +0100
233    
234     1. No character set specified for connection: when a text blob is retrieved, the
235     character set is determined by looking up the native character set using then
236     Firebird API. Otherwise a text mode blob is assumed to have the same character
237     set as the connection.
238    
239     2. TIBGUIInterface: this is an internal interface. Minor type changes to allow
240     for Login Dialog returing a change to the database path.
241    
242     3. Design Time Database and Server login Dialogs now allow the Database Name/Server Name
243     to be changed from that given in the TIBDatabase/TIBServer component and for the
244     entered value to be saved on a project specific basis (design time only).
245    
246     4. IBDynamicGrid: TDBLookupCellEditor now compares its DataFieldName with the
247     column fieldname. If they are the same then it is acts as a look up for the KeyValue
248     Otherwise, it sets the column text to the selected ListField Value.
249    
250     5. IBDynamicGrid: Only visible columns are now taken into account When recalculating
251     column width.
252    
253     6. IBLookupComboEditBox: Fix error with autocomplete query when a RelationName is given
254     and a case insensitive search is requested.
255    
256     7. IBDynamicGrid: No longer ignores notifications removing Column Totals controls
257     or column ListSource.
258    
259     8. IBQuery: no longer performs unnecessary refresh of SQL Text (and hence avoids an
260     unprepare) when closing and the text has not changed.
261    
262     9. IBSQL: Base the cursor name on a GUID instead of a hexstr version of the class pointer.
263     Less likely to cause a cursor re-use error on Windows.
264    
265     10.SV5IPC: include workaround for OSX. FPC 3.0.0 has broken ipc module for darwin.
266     Expected to be fixed in 3.0.2. Hence workaround only applies to 3.0.0.
267    
268     11. TIBTreeView: Guard against nil destination on record changed
269    
270     12. AnsiString Code page support: TIBStringField.AsString and TIBMemoField.AsString now return a
271     string type with the code page set to reflect the returned field encoding after
272     Firebird driver transliteration, if any. FPC 3.0.0 onwards only. Behaviour unchanged for
273     earlier versions.
274    
275     13. AnsiString Code page support: Assigning to TIBStringField.AsString and TIBMemoField.AsString
276     will now result in transliteration to the code page specified for the Firebird driver
277     if the assigned string has a different code page. FPC 3.0.0 onwards only.
278    
279     14. TIBDatabase: new property UseDefaultSystemCodePage. When set any lc_ctype parameter
280     is ignored and the lc_ctype value, when the database is opened, is set to align with
281     the DefaultSystemCodePage (FPC 3.0.0 onwards). Normally, this is what you want and should ensure
282     platform independence. Note: this applies to FPC 3.0.0 and earlier versions. Pre FPC
283     3.0.0, when this property is true, the lc_ctype is UTF8 except under windows when
284     the GETACP is used to determine the Windows code page.
285    
286     15. TIBDatabase: new property DefaultCharSetName. This is the Firebird character set
287     name used as the lc_ctype when the database was opened. Only valid while the
288     Database is connected.
289    
290     16. TIBDatabase: new property DefaultCodePage (FPC >=3.0.0 only). This is the codepage
291     id that corresponds to the DefaultCharSetName.
292    
293 tony 37 IBX Change Log version (1.4-0) Mon, 15 Feb 2016 14:44:24 +0000
294    
295     1. Unix: If Firebird Embedded Server shared object is loaded and a local database
296     path is given and database attach fails due to access permission issues on the
297     temp directory or security database, then the attach is retried with "localhost:"
298     prefixing the databasename. This should avoid problems when the database has to
299     be accessed by a local (e.g. classic) server and libfbembed is used.
300    
301     2. Windows: revised search order for Firebird DLL:
302     i. The Firebird Embedded Server in the application Directory.
303     ii. If the FIREBIRD environment variable is set then the directory this
304     points to is searched for the FB Client DLL and then then underlying
305     "bin" directory.
306     iii. Registry Key HKEY_LOCAL_MACHINE\SOFTWARE\Firebird Project\Firebird Server\Instances
307     is used to locate the Firebird installation directory and the underlying
308     "bin" directory is searched for the FB Client DLL.
309     iv. The Default installation directories C:\Program Files\Firebird\Firebird_2_x
310     are searched for the FB Client DLL.
311     v. The PATH Environment variable is used to search for the FB Client DLL.
312     vi. Finally the PATH Environment variable is used to search for IBASE.DLL.
313    
314     3. New Component: TIBXScript. This is an ISQL compatible SQL script execution engine.
315     See doc/readme.scriptengine and example applications.
316    
317     4. New Component: TIBlocalDBSupport. This is a TIBDatabase support component intended to
318     simplify the use of the embedded firebird server on both Linux and Windows platforms.
319     See dpc/readme.localdatabase and example applications.
320    
321     5. IBDynamicGrid: Reordering on column header click should now also work for
322     dynamic columns.
323    
324     6. ISQLMonitor: (Windows only). Mutex added to TMultilockGate to avoid race condition
325     between incrementing/decrementing the lock count and signalling the event.
326    
327 tony 35 IBX Change Log version (1.3-2) Tue, 26 Jan 2016 14:39:54 +0000
328    
329 tony 37 1.3.2 was never formally released and only made available as beta copies.
330    
331 tony 35 1. DBControlGrid,IBDynamicGrid: Ignore down arrow and up arrow in TCustomMemo
332    
333     2. IBDynamicGrid: Now deals correctly with a single column grid which has no indicator and autosize column
334    
335     3. IBLookupComboEditBox: reset timer on each key press - avoids timer going off too early
336    
337     4. IBDynamicGrid: Call event OnUpdateSortOrder even when aliasname not found in dataset
338     i.e. when it is a calculated field
339    
340     5. IBDynamicGrid: Fix problem selecting a different row when expanded row at end of grid.
341     This problem was due to a race condition between recalculating row heights and
342     determining which row was selected by the mouse click. The row height calculation
343     is now deferred by an extra trip round the message loop allowing the row to
344     be always calculated on the current grid layout rather than risking it being
345     calculated on the grid layout after the expanded row has been shrunk.
346    
347     6. IBLookupComboEditBox: avoid race condition between cm_killfocus and cm_exit on
348     Windows.
349    
350     7. TIBStringField: Now has two new public properties: CharacterSetName: string and CharacterSetSize: integer;
351     These properties allow the (Firebird) character set name for the field and the max number of bytes per character
352 tony 37 to be determined at runtime. See doc/readme.charactersets.html.
353 tony 35
354     8. TIBWideStringField: This is a new field type with the same additional public properties as above and subclassed from
355 tony 37 TWideStringField. This field type is used with the character size reported by Firebird is two. See doc/readme.charactersets.html.
356 tony 35
357     9. TIBMemoField and TIBWideMemoField: new field types with the same additional public properties as above and subclassed from
358     TMemoField and TWideMemoField respectively. These field types are used with Blob subtype 1 and a characterset size of
359 tony 37 1, 3 or 4 (TIBMemoField) or 2 (TIBWideMemoField). See doc/readme.charactersets.html.
360 tony 35
361     Both also have a new published property "DisplayTextAsClassName". If false (default) the displaytext is generated
362     from the blob text by truncating the string to the displaywidth (in characters not bytes). A displaywidth of zero
363     implies no truncation.
364    
365     10. IBLookupComboEditBox: Force autocomplete when EditingDone called and timer active.
366    
367     11. IBDynamicGrid: Call DataSet.Append when entering edit mode and dataset empty and not in insert state
368     (avoids "Not in Edit Mode" error).
369    
370     12. IBDynamicGrid: Correctly resize grid when one column width plus indicator.
371    
372     13. IBDynamicGrid: Ensure Editor Panel has focus when shown - avoids Windows API calling
373     DBGrid.DoExit on subsequent mouse click (e.g. on child control such as a tabbed page control.
374    
375     14. IBDynamicGrid: ignore up, down tab and return when editorpanel open and focus in a TCustomGrid descendent.
376    
377     15. DBControlGrid: Stop flashing grid when dataset closed and then re-opened while DisabledControls
378    
379     16. IBQuery: Bug fixed that prevented SQL being set programmatically once the Parser had been invoked.
380    
381     17. IBCustomDataSet: On close, parser is now freed and Select SQL reverts to value before DataSet Opened.
382    
383 tony 33 IBX Change Log version (1.3-1) Sat, 18 Jul 2015 13:30:50 +0100
384 tony 31
385     1. OnCloseUp Event Handler added to TDBLookupProperties
386    
387     2. IBDynamicGrid: Call to OnEditorPanelHide is now last editor hide action - avoids
388     problem with row size when exception is called.
389    
390     3. IBLookupComboEditBox: Force pending autocomplete on combobox exit.
391    
392     4. IBDynamicGrid and DBControlGrid: Keyhandler now ignores up, down, escape and return keys if
393     in a TCustomComboBox and ignores return key if in a TCustomMemo
394    
395     5. IBLookupComboEditBox: Ensure that KeyValue is set correctly when full text
396     keyed in i.e. when autocomplete not performed
397    
398 tony 33 6. Cleanup of "Uses" clauses and add console mode support. IBX should now support
399     console mode applications with all LCL required functions (builtin dialogs and
400     cursor management) centralised in the IBDialogs unit. As long as "IBDialogs" is
401     not included in your project, IBX should compile and link with a console mode program.
402     See consolemode example and its "readme"for further guidence. DO NOT add the ibexpress package to a
403     console mode application or the IDE will automatically assume that your
404     application is GUI based. Instead, you should include the ibexpressconsolemode package.
405 tony 31
406     IMPORTANT NOTE: IBDialogs must be included in GUI applications in order
407     to use the built in dialogs and cursor management. IBDialogs is
408 tony 33 included by default if "ibexpress" is in your project source's "uses" clause.
409 tony 31 This should be the case for all projects created through the IDE. This is why
410     you do not want to add the ibexpress package to console mode applications. The
411     ibexpressconsolemode package has been created to allow console mode programs
412     to avoid adding LCL dependencies when using IBX, while still having the
413     unit search paths set up correctly.
414    
415 tony 33 Existing users should check to ensure that the "ibexpress" unit is included in
416     each project's source file (*.lpr).
417    
418 tony 31 You may find that in order for the IDE to recognise that ibexpressconsolemode
419     exists, you have to first open the package in the IDE and then close it. This
420     adds it to the most recently accessed packages list. To make it permanently
421     available, add the package name to lazarus' staticpackages.inc file.
422    
423 tony 33 Thanks to Julio Jiménez for suggesting support of console mode.
424 tony 31
425     7. SQL Parser can now accept quoted strings that include new lines
426    
427     8. IBDynamicGrid: Lookup Cell Editor - the cursor is now positioned at end
428     of text on start of edit. This is particularly useful when tabbing to a
429     column and then inserting text.
430    
431     9. New Examples provided for IB Services and ISQLMonitor.
432    
433     10. Fix error when writing to blob streams that recorded only the last buffer
434     write in the blob stream. In most cases, this did not cause a problem as the
435     IB Blob Stream is written in a single write. However, with the TDBImage, write
436     of a graphic type prefix was lost which caused a problem when the image could
437     not be automatically recognised.
438    
439     11. Improve generation of random cursor names in TIBSQL - avoid risk of "cursor
440 tony 33 already open" errors due to random numbers used for the cursor name being identical.
441 tony 31
442     12. IBTable: corrected error that could result in an "Index out of bounds" error
443     when opening the table and the Primary Key is the last or only column in the
444     table. Thanks to Rick Hoover for the fix.
445    
446 tony 33 13. Fix TIBDatabase initialisation of lc_ctype under unix. Set to "UTF8" instead
447     of "UTF-8", and update list of available database character sets. Existing
448     users should check the current lc_ctype setting in their applications.
449 tony 29
450 tony 33 IBX Change Log version (1.2-4) Sat, 09 May 2015 12:38:29 +0100
451    
452 tony 29 1. Firebird Services: avoid List Index error when opening a service with an
453     empty Params property.
454    
455     2. IBControls: Fix problem with new link mechanism introduced in 1.2.3.
456     Link now set up in Loaded method - avoids occasional failure to apply
457     SQL markup on initial open.
458    
459     3. "Employees" example performance improvements when scrolling.
460    
461     4. DBControlGrid: Correctly handle edit panel removal when panel is child control of a
462     TFrame. Force recaching of selected frame to avoid GTK race (results in a
463     random image cached).
464    
465     5. DBControlGrid: Should now react to changes in panel height at run time.
466    
467     6. IBDynamicGrid: Redraws rows below on panel editor hide - avoids blank space at end of grid
468     even when further rows exist.
469    
470     7. DBControlGrid: DefaultRowHeight is no longer a published property as it should
471     always be derived from panel height and setting this property can cause confusion.
472     Note for existing projects: to avoid a missing property error at run time,
473     each form using the DBControlGrid must be opened, updated and saved in the IDE
474     in order to remove the property value from the lfm.
475    
476    
477 tony 33 IBX Change Log version (1.2-3) Tue, 14 Apr 2015 14:11:17 +0100
478 tony 27
479     1. TIBStoredProc. Prepare now called by ParamByName to avoid need to always
480     call Prepare before setting parameter values.
481    
482     2. Error message on ParamByName (all cases) not found now includes name of missing parameter.
483    
484     3. Code tidyup and more robust handling of dsql information result vector.
485    
486     4. Support for centralised handling of transaction status changes. TIBTransaction
487     has been given additional events "AfterEdit", "AfterInsert", "AfterDelete", "AfterPost"
488     and "AfterExecQuery". The first three are called after the same event is called
489     for an IBCustomDataSet descendent using the Transaction. The fourth is called
490     after a call to TIBSQL.ExecQuery, again using this transaction. These new events
491     enable monitoring of transaction status changes for a given transaction to be
492     handled in a single place. For example, when a change to the dataset occurs
493     an indicator can be set that shows the user that in order to save changes,
494     the transaction should be committed. Rather than doing this per dataset, this
495     can now be done per transaction.
496    
497     5. TDataSet.CheckBrowseMode automatically posts changes to the current row when
498     the dataset is scrolled. However, any changes to the current row are, by default,
499     discarded when the dataset is closed. TIBDataSet, TIBQuery and TIBTable now
500     have a new property "DataSetCloseAction" that adds automatic posting of changes
501     on dataset close. If this property is set to dcDiscardChanges (default) then the
502     behaviour is unchanged from previous versions. if the value is set to dcSaveChanges
503     then IBX will attempt to post any unsaved changes before the dataset is closed
504     (and after the BeforeClose event handler is called). The exception is when the
505     dataset is being closed as a result of a transaction rollback. In this case,
506     no action is taken and any unsaved changes are discarded. This avoids both
507     unnecessary overhead and the risk that a validation error may occur in the Post
508     raising an exception and thereby preventing a rollback.
509    
510     6. String Field sizes and Display Widths should now be correct for multi-byte character sets.
511     In earlier versions, the Display Width was set to the maximum byte width rather than the character
512     width. Display Widths are now corrected by dividing by the max byte width per character.
513     For UTF8 character sets, the byte width is four and hence the Display Width will be
514     the byte width divided by 4. The byte width of each character set is determined
515     dynamically when the database connection is estabished from the RDB$CHARACTER_SETS
516     system table. (see also http://bugs.freepascal.org/view.php?id=27766).
517    
518     7. SQLParser will now correctly parse SQL Text which contains ':' within quoted string.
519    
520     8. IBLookupComboEditBox: List should now always be restored to full list when the
521     control loses focus. Default Key press default interval reduced to 200ms.
522    
523     9. DBControlGrid: Ensure that selection is changed to newly appended row, even
524     when dataset rows are less than visible rows.
525    
526     10. IBDynamicGrid: Editor Panel is not shown on indicator click if Datasource
527     does not exist or DataSet is empty. More responsive on dataset open. New event
528     OnRestorePosition. Column sort disabled if no header row.
529    
530     11. IBTreeView: improved handling of response to "Add Node". Avoid scrolling dataset
531     while dataset state is dsInsert. Avoids posting errors.
532    
533     12. IBControls: New mechanism for distributing UpdateSQL and UpdateParams events. This is to
534     avoid conflict with DisableControls/EnableControls with Master/Detail linked tables.
535    
536     13. IBLookupComboEditBox: Now avoids SQL Errors when combo box text contains single quotes.
537    
538     14. TIBDataSet and TIBQuery: new Event - OnValidatePost. This event has been introduced
539     to solve a specific problem. That is when the dataset cursor is moved (e.g. by
540     a grid mouse click and the current row is being edited or inserted. In this case, TDataset
541     always "posts" the current record regardless or whether or not it may be more appropriate
542     to cancel any changes; the post occurs before the "BeforeScroll" event fires due to the way the
543     "MoveBy" function is implemented by TDataSet. The OnValidatePost event is called
544     as the first action of the "Post" method and allows the handler to convert the Post
545     into a Cancel if that is the appropriate action on moving to a different row. This is
546     achieved by returning with "CancelPost" argument set to true. Note that an exception could be
547     raised here, but it may still be more appropriate to validate a post and signal
548     a problem in the "BeforePost" event handler. See readme.automaticposts.xhtml)
549    
550     15. On Unix derived systems, the Firebird library name can now be given as a colon
551     separated list. Each library name on the list is tried in turn, in left to right
552     order with the first found being used as the firebird library. By default, on Linux,
553     the library name list is 'libfbembed.so.2.5:libfbembed.so.2.1:libfbclient.so.2'. This can be
554     overidden by the FBLIB environment variable or the OnGetLibraryName function.
555    
556     Note: when using the libfbembed.so, if you prefix the database name with "localhost:"
557     then it will still attempt to access the database via the Firebird Server and will
558     require a username and password. If only the pathname is given, then the username
559     and password should be omitted and the unix file permissions are used to grant
560     access.
561    
562 tony 33 IBX Change Log version (1.2-2) Sat, 14 Mar 2015 11:35:04 +0000
563 tony 23
564     1. A new IBControl - TDBControlGrid has been added. TDBControlGrid a lookalike
565     rather than a clone for the Delphi TDBCrtlGrid. TDBControlGrid is a single column grid
566     that replicates a TWinControl - typically a TPanel or a TFrame in each row. Each row
567 tony 27 corresponds to a row of the linked DataSource. Any data aware control on the
568 tony 23 replicated (e.g.) TPanel will then appear to have the appropriate value for the row.
569    
570     2. As suggested by Julio Jiménez, a new property "SQLHourGlass" has been added to TIBDatabase.
571 tony 25 When set to false (default true), the Hour Glass cursor is supcpressed and no cursor change
572 tony 23 takes place during database access. This may be useful when there are performance issues with
573     the change of cursor. Setting the property to false suppresses the change of cursor.
574    
575     3. As suggested by Julio Jiménez, a new property "AutoCommit" has been added to TIBDataSet, TIBQuery
576     and TIBTable. When set to acCommitRetaining (Default: acDisabled), a call is made to
577     Transaction.CommitRetaining immediately after every Post or Delete. This has the effect of
578     making all changes permanent immediately rather than when the transaction is explicitly
579     committed.
580    
581 tony 25 4. Experimental support for the Firebird 3 SQL_BOOLEAN type has been added while still
582 tony 27 using the legacy Firebird API. Thanks to Gabor Boros for helping to test this feature.
583 tony 23
584 tony 33 IBX Change Log version (1.2-1) Fri, 13 Mar 2015 11:14:15 +0000
585 tony 25
586     Development version only.
587    
588 tony 33 IBX Change Log version (1.2-0) Thu, 26 Feb 2015 10:34:04 +0000
589 tony 21
590     1. An internal select SQL Parser is now available for TIBCustomDataset descendents.
591     This is typically used during an "OnBeforeOpen" event handler to manipulate the
592     "Where" and "Having" clauses to implement user specified filters of arbitrary
593     complexity.
594    
595     2. A new Component Palette entry "Firebird Data Controls" is now available. This has
596     three new data aware controls dependent on IBX and which make use of the SQL Parser.
597     These are:
598    
599     - TIBLookupComboEditBox
600     - TIBDynamicGrid
601     - TIBTreeview
602    
603     TIBLookupComboEditBox is a TDBLookupComboBox descendent that implements "autocomplete"
604     of typed in text and "autoinsert" of new entries. Autocomplete uses SQL manipulation
605     to revise the available list and restrict it to items that are prefixed by the
606 tony 25 typed text (either case sensitive or case insensitive). Autoinsert allows a
607 tony 21 newly typed entry to be added to the list dataset and included in the available
608     list items.
609    
610     TIBDynamicGrid is a TDBGrid descendent that provides for:
611     - automatic resizing of selected columns to fill the available row length
612     - automatic positioning and sizing of a "totals" control, typically at the
613     column footer, on a per column basis.
614     - DataSet resorting on header row click, sorting the dataset by the selected column.
615     A second click on the same header cell reversed the sort order.
616     - Support for a "Panel Editor". That is on clicking the indicator column, the row
617     is automatically expanded and a panel superimposed on it. The panel can have any
618     number of child controls, typically data aware controls with the same datasource
619     as the grid allowing for editing of additional fields and more complex editors.
620     - Reselection of the same row following resorting.
621     - A new cell editor that provides the same functionality as TIBLookupComboEditBox.
622     Its properties are specified on a per column basis and allows for one or more
623     columns to have their values selected from a list provided by a dataset.
624     Autocomplete and autoinsert are also available. The existing picklist editor
625     is unaffected by the extension.
626    
627     TIBTreeView is a data aware TCustomTreeView.
628    
629     3. When getting a field value using FieldByName.AsVariant, an SQL_INT64 with a
630     zero scale will no longer return an error. An Int64 will be returned instead.
631    
632     4. TIBTransaction now has events for Before and After Transaction End and a new function
633     "GetEndAction" allowing the EndAction to be accessed by these event handlers.
634    
635     5. TIBQuery can now handle correctly queries which contain the same keyword parameter
636     repeated multiple times.
637    
638     6. TIBUpdateSQL will no longer return an error when "RowsAffected" is <> 1. This error
639     check used to get in the way of using Stored Procedures, and "Update or Insert"
640     statements.
641    
642     7. Insert, Modify and Delete property Editors now support Query Generation from
643     Stored Procedures.
644    
645     8. Three new examples illustrate the use of the new IB Controls
646    
647    
648 tony 33 IBX Change Log version (1.1-0) Mon, 07 Jul 2014 14:01:07 +0100
649 tony 19
650     1. TIBXSQLVAR code clean up and optimisation to improve client side "prepare" and parameter
651     setting performance. See "readme.field+param.names in the doc folder.(Thanks to
652     Gabor Boros for reporting this problem and for testing the improvements).
653    
654     2. IBX can now support dialect 3 quoted column names that contain spaces and which differ only in their case.
655     See readme.field+param.names in the doc folder.
656    
657     3. IBX SQL Editors will now automatically add double quotes around column names when the database
658     dialect is "3" and the column name contains spaces or is a Firebird 2.5 SQL Reserved Word.
659    
660     4. Param Type LargeInt now supported in TIBQuery and TIBStoredProc
661    
662     5. TIBSQL.ExecQuery retry on failure removed to avoid problems with "at most once"
663     actions.
664    
665     6. TIBTransaction.SetDefaultDatabase uses SetObjectProp instead of mis-using SetOrdProp (with
666     thanks to Yuriy Kopnin for pointing this out).
667    
668     7. GenerateParamName is now a published property of TIBSQL, TIBQuery and TIBDataSet.
669    
670     8. varWord, varShortInt and varInt64 added to TIBXSQLVAR.SetAsVariant and hence now available as variant types
671     for both fields and parameter setting.
672    
673     9. Changes to the Select SQL in an IBCustomDataset descendent should now be
674     visible in the Fields Editor immediately afterwards - rather than only after cycling the "active" property.
675    
676     10. TIBSQL SQL editor will operate correctly and not report an SQL syntax error on SQL test,
677     when DSQL ('?') parameter placeholders are used and the TIBSQL.GenerateParamNames property is set to true.
678    
679     11. TIBTable now has a property editor for "MasterFields"
680    
681     12. SQL Property Editors now include a checkbox "Allow DSQL Placeholder". This corresponds to the
682     GenerateParamNames property and should be set when using DSQL (i.e. '?') style parameters.
683    
684     13. The IBTransaction editor now has a radio button ("Unspecified") which is set when the combination
685     of settings is unrecognised. Selecting this radio button has no effect on the settings.
686    
687    
688 tony 17 IBX Change Log version (1.0-5) Sat, 28 Dec 2013 19:22:23 +0000
689    
690     1. TBookmark change conditional compile changed to >= 2.7.0 to match revised availability of change.
691    
692 tony 15 IBX Change Log version (1.0-4) Thu, 28 Feb 2013 16:56:13 +0000
693    
694     1. In a TIBCustomDataset descendent, a generator now only sets the value when
695     it is null. This allows for alternative user defined setting of the generator
696    
697     Many thanks to Julio Jiménez for this fix
698    
699     2. An Error Dialog is now displayed in the Lazarus IDE if IBX cannot find the Firebird Library
700     and suggests that the user may have forgotten to install it.
701    
702 tony 13 IBX Change Log version (1.0-3) Thu, 22 Nov 2012 22:53:39 +0000
703    
704     1. Conditional compilation used to limit registration of TIntegerField to
705     Lazarus versions less than 1.1
706    
707     2. When a database connection is created, character set is now by default set
708     to UTF8 (Unix) or to the current Windows code page (Windows) if in the range
709     1250 to 1254.
710    
711    
712 tony 11 IBX Change Log version (1.0-2) Tue, 09 Oct 2012 09:10:30 +0100
713    
714     1. TBookmark change conditional compile changed to > 2.6.2 to match expected availability of change.
715    
716    
717 tony 9 IBX Change Log version (1.0-1) Sun, 05 Aug 2012 20:00:04 +0100
718 tony 7
719     1. In IBCustomDataset. Changed CurBookmark from string to TBookmark for compiler versions > 2.6.0
720     Necessary because of TBookmark type and TDataSet.Bookmark property change in fpc 2.7.1
721    
722     2. IBX now registers TIntegerField as a "No Icon" component. This may be removed if the fpc DB
723     package is changed to do this (which it should do).
724    
725     IBX Change Log version (1.0-0) Sat, 28 Apr 2012 16:43:00 +0100
726    
727     1. Add "if active then active := false" to TIBCustomDataset destructor. (Avoid error on database close).
728    
729     2. Make use of $STATIC conditional in IBSQLMonitor (Needed for FPC 2.6.0 compliance)
730    
731     3. Database Property Editor: Character Set drop down box now uses "OnChange" rather than "OnCloseUp" to react to changes
732    
733     4. Property editors should now correctly resize.
734    
735     5. In IBDatabaseEdit.TestClick, the LoginPrompt is now set to the state of the LoginPrompt Checkbox
736     (restored original functionality)
737    
738     6. Under OSX, if IBX fails to load libfbclient.dylib, it will now try and load the firebird
739     library using the absolute path /Library/Frameworks/Firebird.framework/Firebird.